Revert "Revert "In the float translateCanSignal(), I removed the if(send) check around""

This reverts commit a730ab62ff98ffe4414de1e03612241bc5acc5d7.
Calling all hanlders (float, bool, string) on each received CAN message.
Merge branch 'fuelfix' of github.com:openxc/cantranslator into fuelfix
Added tests to make sure the Float, Bool, and String handlers get
called for each CAN message, not just when send is true.
Added a note that signal handlers get called whether the send flag
is true or false.
Merge branch 'next' into fuelfix
Organize custom handlers section now that's it's grown up.
Expand a line to fill 80 chars, more breathing room without indentation.
Return a bogus value in a test handler to avoid confusion.
Merge branch 'pr/106' into next